Find an alternative to Line.getInterpolatedPolygon()

[hadim]

During kymograph creation I use the following code :

currentLine = new Line(new_xStart, new_yStart, new_xEnd, new_yEnd);
 currentLine.setStrokeWidth(1);
imp.setRoi(currentLine);

xpoints = currentLine.getInterpolatedPolygon().xpoints;
 ypoints = currentLine.getInterpolatedPolygon().ypoints;
npoints = currentLine.getInterpolatedPolygon().npoints;

I am pretty sure it makes things slower...

[hadim]

See https://github.com/fiji/KymographBuilder/blob/master/src/main/java/fiji/plugin/kymographbuilder/KymographCreator.java#L169

I am looking for help here. I don't know how to do that.

[hadim]

I found an IJ2 algorithm that could do the job here : https://github.com/imglib/imglib2-roi/blob/master/src/main/java/net/imglib2/roi/util/ROIUtils.java#L126

The thing is for now bresenham() is guessing a closed loop. So I need to adapt it to my needs (and maybe submit a PR to imglib2-roi ?).

[hadim]

ROIUtils.bresenham() is not exactly the same as Line.getInterpolatedPolygon(). For example it does take into account the interval = 1 seen in Line.getInterpolatedPolygon().

• Line.getInterpolatedPolygon() : https://github.com/imagej/ImageJA/blob/master/src/main/java/ij/gui/Roi.java#L439
• ROIUtils.bresenham() : https://github.com/imglib/imglib2-roi/blob/master/src/main/java/net/imglib2/roi/util/ROIUtils.java#L126

So for now I don't plan to remove the IJ1 deps.

[hadim]

See imglib/imglib2-roi#27